Dupuytren's contracture

According to Wikipedia, "Dupuytren's contracture (also known as morbus Dupuytren, or Dupuytren's disease and slang terms 'Viking disease' or 'Celtic hand'), is a fixed flexion contracture of the hand due to a palmar fibromatosis, where the fingers bend towards the palm and cannot be fully extended (straightened). It is an inherited proliferative connective tissue disorder that involves the hand's palmar fascia. It is named after Baron Guillaume Dupuytren, the surgeon who described an operation to correct the affliction in the Lancet in 1831."